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Author:

Zhang, Guosheng (Zhang, Guosheng.) | Wang, Qiang (Wang, Qiang.) | Li, Yue (Li, Yue.) | Zhang, Mingzhong (Zhang, Mingzhong.)

Indexed by:

EI Scopus SCIE

Abstract:

This paper presents a systematic study on the evolution of phase composition, microstructure and micro -mechanical properties of magnesium phosphate cement (MPC) and their relations to macroscopic mechanical properties. The results indicate that the microstructure of MPC is mainly composed of a crystal region of po-tassium magnesium phosphate hexahydrate (MKP) and a hybrid region of magnesium oxide and amorphous hydration products. The elastic modulus and hardness of MKP crystals are 20.18 GPa and 1.15 GPa, respectively. Amorphous hydration products may consist of MgKPO4 and Mg3 (PO4)2. The elastic modulus of amorphous MgKPO4 drops gradually from 51.4 GPa to 29.2 GPa with increasing curing age towards the elastic modulus of crystalline MKP, while the elastic moduli of amorphous Mg3(PO4)2 and unreacted MgO are approximately 160 GPa and 300 GPa, respectively. The macroscopic strength of MPC is mainly dependent on its pore structure rather than the micromechanical properties of hydration products.

Keyword:

Nanoindentation Nuclear magnetic resonance Magnesium phosphate cement Micromechanics Microstructure

Author Community:

  • [ 1 ] [Zhang, Guosheng]Tsinghua Univ, Dept Civil Engn, Beijing 100084, Peoples R China
  • [ 2 ] [Wang, Qiang]Tsinghua Univ, Dept Civil Engn, Beijing 100084, Peoples R China
  • [ 3 ] [Li, Yue]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Beijing Key Lab Earthquake Engn & Struct Retrofit, Minist Educ, Beijing 100124, Peoples R China
  • [ 4 ] [Zhang, Mingzhong]UCL, Dept Civil Environm & Geomat Engn, London WC1E 6BT, England

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Source :

CEMENT AND CONCRETE RESEARCH

ISSN: 0008-8846

Year: 2023

Volume: 172

1 1 . 4 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:26

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 50

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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